can i do caching with php?

Question

I have read a few things here and there and about PHP being able to "cache" things. I'm not super familiar with the concept of caching from a computer science point of view. How does this work and where would I use it in a PHP website and/or application.

Thanks!

Answer 1

You can cache:

1. Query results
2. The HTML output of a PHP script/request
3. Cache variables
4. Cache parts of a page.
5. Cache the code itself (speeds up things, no need to do bytecode).

Each of those is a different subject with different methods.